Blakesburg weather by month
What a typical year looks like in Blakesburg, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Ottumwa Industrial Airport, 22 km from Blakesburg; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 37 in939 mm
- Snow a year
- 24 in60 cm
- Last spring freeze
- Apr 18
- First fall freeze
- Oct 12
- Heating degree days
- 6,147
- Cooling degree days
- 985
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −6°−21° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Blakesburg in January
Highs average 32°0° and lows 14°−10°, with 1 in26 mm of precipitation and 7 in18 cm of snow in a typical January.
- Record high
- 71°22° (1989)
- Record low
- −23°−31° (1982)
- Heating degree days
- 1305
- Cooling degree days
- 0
Blakesburg in February
Highs average 37°3° and lows 18°−8°, with 1.4 in36 mm of precipitation and 6 in15 cm of snow in a typical February.
- Record high
- 79°26° (2017)
- Record low
- −27°−33° (1996)
- Heating degree days
- 1053
- Cooling degree days
- 0
Blakesburg in March
Highs average 50°10° and lows 29°−2°, with 2.2 in57 mm of precipitation and 3 in8 cm of snow in a typical March.
- Record high
- 91°33° (2026)
- Record low
- −20°−29° (1962)
- Heating degree days
- 791
- Cooling degree days
- 2
Blakesburg in April
Highs average 63°17° and lows 39°4°, with 3.8 in95 mm of precipitation and 1.4 in3.6 cm of snow in a typical April.
- Record high
- 91°33° (1965)
- Record low
- 9°−13° (1982)
- Heating degree days
- 426
- Cooling degree days
- 9
Blakesburg in May
Highs average 73°23° and lows 51°11°, with 5 in128 mm of precipitation in a typical May.
- Record high
- 97°36° (2018)
- Record low
- 24°−4° (2005)
- Heating degree days
- 162
- Cooling degree days
- 67
Blakesburg in June
Highs average 82°28° and lows 61°16°, with 5.4 in137 mm of precipitation in a typical June.
- Record high
- 103°39° (1988)
- Record low
- 41°5° (2023)
- Heating degree days
- 17
- Cooling degree days
- 215
Blakesburg in July
Highs average 86°30° and lows 65°18°, with 3.9 in98 mm of precipitation in a typical July.
- Record high
- 106°41° (2012)
- Record low
- 48°9° (1971)
- Heating degree days
- 2
- Cooling degree days
- 315
Blakesburg in August
Highs average 84°29° and lows 62°17°, with 4.4 in113 mm of precipitation in a typical August.
- Record high
- 105°41° (1983)
- Record low
- 41°5° (1950)
- Heating degree days
- 7
- Cooling degree days
- 255
Blakesburg in September
Highs average 77°25° and lows 53°12°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 100°38° (1984)
- Record low
- 27°−3° (1984)
- Heating degree days
- 98
- Cooling degree days
- 106
Blakesburg in OctoberThis month
Highs average 64°18° and lows 42°5°, with 2.8 in71 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 93°34° (1953)
- Record low
- 17°−8° (1972)
- Heating degree days
- 391
- Cooling degree days
- 16
Blakesburg in November
Highs average 50°10° and lows 30°−1°, with 2.1 in53 mm of precipitation and 1.6 in4.1 cm of snow in a typical November.
- Record high
- 79°26° (1999)
- Record low
- −9°−23° (1964)
- Heating degree days
- 762
- Cooling degree days
- 0
Blakesburg in December
Highs average 37°3° and lows 20°−7°, with 1.4 in37 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 75°24° (2021)
- Record low
- −21°−29° (1989)
- Heating degree days
- 1133
- Cooling degree days
- 0